[Matroska-devel] Timestamp precision in matroska files

Alexander Noé alexander.noe at s2001.tu-chemnitz.de
Tue Jan 6 20:21:16 CET 2004


Steve Lhomme wrote:

> Alexander Noé wrote:
>
>> Christian HJ Wiesner wrote:
>>
>>>
>>> Hi,
>>>
>>> here an interesting log from #foobar2000 :
>>> --------------------------------------------------------------------------------------------------------------
>>> <ChrisHJW> DEATH : are you here ?
>>>  <DEATH> yes
>>>  <ChrisHJW> DEATH : there is an alpha muxer to write MKA files with 
>>> factor 10 higher time resolution
>>>  <ChrisHJW> 100 µs
>>>  <Case> not enough
>>
>>
>>
>> The scale can be adjusted by will.
>>
>>>  <ChrisHJW> or is 10 µs ok ?
>>>  <Case> is not for high rates
>>
>>
>>
>> Then we need a new block type, with more than 16 bits for the timecode.
>
>
> What about the same Block using a new attached (in BlockMore) 
> containing the number of samples since the beggining ? A la Granule Pos.
> This could apply to video for the number of frames too. 

That does not fix the overhead, caused by one frame per cluster....using 
1 ns granularity and 32 bit block timecodes
is imho easier.


Alex





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